diff --git a/src/ImageContainer.py b/src/ImageContainer.py
index 9004d99..faf2c0f 100644
--- a/src/ImageContainer.py
+++ b/src/ImageContainer.py
@@ -28,7 +28,7 @@ class ImageContainer:
         # PIL Image.size returns (width, height)
         return self._imageData.size if self._imageData is not None else (0, 0)
 
-    def getImage(self) -> Image:
+    def getImage(self) -> Image or None:
         return self._imageData
 
     def saveImage(self, path: str) -> None: